Safety razor



Ma 14, 1935. H R, SEGA; 2,001,213

SAFETY RAZOR ed Oct. 5, 1931 "/lur 4 4 h W INVENTOR Sega! ATTORNEYS Patented NITED STATES PATENT OFFICE Application October 3,

2Claims.

This invention relates to improvements in safety razors.

It is a primary object of the present invention to provide an improved safety razor head which will present an inclined shaving blade to the surface being shaved, that is, an edge arranged at an angle other than a right angle to the handle.

It is a further object to provide a new type of abutment on the plate and guard of the razor for more effectively supporting the blade in the head.

The above and other objects will appear more fully from the following description when considered in connection with the drawing in which:

Fig. l is a longitudinal sectional view through one form of razor constructed in accordance with my invention.

Fig. 2 is an outer face view of the guard shown in Fig. 1.

Fig. 3 is an irmer face view of the clamping plate shown in Fig. 1.

Fig. 4 is a face view of the blade constructed in accordance with my invention and adapted to be supported in the razor illustrated in Figs. 1, 2 and 3.

Referring to the details of the drawing the razor disclosed comprises a handle I and a head I2. The head 82 is formed with a guard l4 and a plate It is received thereon in position to clamp the blade 20 between the plate and guard as will be understood. The guard M is formed with a comparatively thin, tortuous, web-like surface projection or abutment l8 of general S-formation, the abutment being relatively narrow throughout its length so that a minimum of material is removed from the blade to be received over the projection. The wings of this projection provide on their concaved sides clamping surface l8 to en-v gage portions of a slotted blade, as hereinafter described. The plate It is similarly provided with an s-shaped recess I 9 to receive the projection IS on the guard and defining clamping surfaces i9 for coaction with the aforesaid clamping surfaces The head of the razor illustrated herein is arranged at an angle of approximately 6 with respect to a plane perpendicular to the handle ll! although a greater or lesser inclination of the head is within the contemplation of the invention. This is accomplished in the two-piece razor disclosed in Fig. 1 by inclining the guard with respect to the handle and securing the two parts rigidly together as shown. When the plate is drawn up against the blade and guard the shaving edge of the razor is then inclined with respect 1931, Serial No. 566.620

to the handle l0 sufliciently that the shaving edge has a slight endwise' movement as the razor is moved in the normal manner.

The plate It and the guard ll preferably extend outwardly beyond the edges of blade 20 in order to protect the blade and to provide the overhanging edges which may be damaged without affecting the blade 20 when it is in clamped position. The upper portion of the plate-l6 is rounded 01f as indicated at 2| to avoidall sharp edges and to facilitate shaving in diflicult places. The outer ends of the clamping plate are formed with recesses l6 extending along the lower edges of the plate, the recesses serving to space the metal of the plate from the blade and guard so that if small burrs should form on the plate they will not interfere with the assembling of the parts of the razor.

The outer ends of the guard It may be recessed as indicated at H to facilitate the removal of the plate l6 and blade from the guard. The portions of the ends of the guard I4, outwardly of the recesses H, are recessed to provide surface recesses it, similar to the recesses It for receiving burrs formed on the ends of the clamping plate.

The plate I6 is provided with an attachment lug 2 t, screw-threaded as at and pivoted at 26 to one or more lugs carried by the plate. The sleeve bolt or stem 28 is formed with an internally threaded portion 29 to receive the screw-v threaded portion 25 of the attachment lug. The. stem 28 is rigidly connected to or integrally formed with a thumb nut 30 and is supported within the hollow handle I 0 by means of a collar or bushing 32 loosely received on the stem 28 and held in place adjacent thethumb nut by means of a pin 33. The collar 32 has a forced fit within the interior of the handle in so as not to be readily removable from the handle. This construction causes the sleeve nut and the thumb nut 30 and stem 28 to be more or less permanently associated with the handle Ill but permits the parts to be disassociated if necessary for any purpose.

The blade 20 illustrated in Fig. 4 and constructed to be used with the razor shown in Figs. 1, 2 and 3 is of the same general shape as the guard and clamping plate and is preferably formed with the rounded ends 22 to be positioned above the recesses l1 and with an S-shaped aperture 24 corresponding to the abutment I8 for being received over the same.

In the use,of the above razor the head 12 will be inclined with respect to a plane perpendicular to the handle "I placing the. shaving edge of the blade at an angle other than'a right-angle to the path of-movement of the head during its use. The s-formation of the abutment and recess on the guard and plate and the S-slot in the blade assure a snug fit between these parts and a minimum-removal of metal from the blade. For almost the entire length of the blade there is pr'o vided a-body of metal extending unbroken from .the center line a of the blade to the shaving edges. Heretofore it has been the practice to make the longitudinal slots of the blade more or less continuously straight along the longitudinal center line or axis of the blade and of such width as to extend to some degree into the blade continuously on both sides of such line, with the result that the blade is weakened along its center line by an open portion leaving intact only short central portions of the blade at its ends which are liable to split under flexing'movementsof the blade, thus rendering the blade useless. In place of a longitudinal slot of some material width it has been proposed to use a very narrow slot or slit of straight or wavy form in connection with circular openings of a size to give a certain degree of transverse flexibility to the blade, but the use of such narrow slot or slit requires the use in connection therewith of at least three-circular openings of fairly large diameter, one located at the center and one at each end of the slit in order to allow the blade to flex transversely, but the degree of flexibility obtained by this construction is far less than, that obtained by the provision of an S-shaped slot in accordance with my construction, and the terminal openings must be disposed some distance from the ends of the'blade, as otherwise the blade would be undesirably weakened at its ends. This construction results in the blade being unduly stiff and incapable of bending freely enough to conform to the transverse curvatures of some types of holders. These objections are overcome in my construction by the use of a sinuous or sshaped slot, the substantially hook-shaped wings of which extend from a common center symmetrically to equal degrees on opposite sides of,

the longitudinal center of the blade and provide the projections of which lap the center line of the blade, or, in other words, which extend on op- DOSiliB sides of the transverse center of the blade from opposite longitudinal sides of the slot across the center line or axis of the blade and thus break the continuity of the slot along such line, the blade being clamped at points along its center line by engagement of the portions I8 and I9 of the guard and clamping plate with the projections 11/. The effect of this .S-shaped construction of slot, therefore, is to provide a slot having a circular central portion and reversely arranged hook-shaped or crescent-shaped wings at opposite sides thereof, which slot structure gives to the blades the same degree of flexibility as a continuous :slot extending along the median line of the blade substantially from end to end thereof, without, however,' impairing the strength of the ends of the blade as in the case of the use of a continuous straight slot. A blade so constructed is accordingly more rigid and less subject to breakage under flexing movements and will be held more firmly between the guard and clamping plate than with previously know constructions.

Having now described my invention, I claim:

/ 1. In a safety razor, the combination of a holdgular body of thin flexible steel having cutting edges along the opposite longitudinal margins thereof, said bodyhaving a central opening therein and similar hook-shaped slots intersecting opposite sides of the opening and disposed between the same and the opposite end edges of the blade, said slots being arranged in reverse order with respect to the cutting edges so that each extends sinuously to like degrees on opposite sides of the longitudinal center line of the blade with the convex side of one slot facing one of the cutting edges of the blade and the concaved side of the same slot facing the opposite cutting edge of the blade and the corresponding sides of the other slot facing the said respective cutting edges in reverse order with respect to the sides of the flrstnamed slot, one slot having its inner and outer ends generally inclined obliquely of the blade toward the corners at one end of the blade and the other slot having its inner and outer ends similarly inclined toward the corners at the opposite end of the blade, the guard being provided with a central opening and hook-shaped pro-. jections conforming in contour to and adapted to respectively aline with and engage the said opening and slots in the blade and the clamping plate being provided with complementary recesses to'.

receive said projections, an attaching stem on the clamping plate to project through the openings in the guard and blade, and means carried by the holder to engage said stem to hold the clamping plate and guard in clamping relation to the blade.

2 A safety razor blade comprising a substantially'oblong rectangular body of thin flexible steel having cutting edges along the opposite longitudinal margins thereof, said body having a central opening therein and similar hook-shaped slots intersecting opposite sides of the opening and disposed between the same and the opposite end edges of the blade, said slots being arranged in reverse order with respect to the cutting edges so that each extends sinuously to like degrees on opposite sides of the longitudinal center line of the blade with the convex side of one slot facing one of the cutting edges of the blade and the concaved side of the same slot facing the opposite cutting edge of the blade and. the corresponding sides of the other slot facing the said respective cutting edges in reverse orderwith respect to the sides of the first-named slot, one slot having its inner and outer ends generally inclined obliquely of the blade toward the corners at one end of the blade and the other slot having its inner and outer ends similarly'inclined toward the corners at the opposite end of the blade, whereby the side walls of each slot are arranged to form longitudinal and transverse'abutments for coaction with similar abutments on a blade holder to prevent both longitudinal and lateral shiftin of the blade on the holder, and whereby clamping projections are provided on the blade at the concaved sides of the slots which project from opposite sides of the longitudinal center line of the blade across such center line for engagement with coacting clamping surfaces on the blade 

